pango:font-description-style (desc)

desc -- a pango:font-description instance
style -- a pango:style value for the style for the font description

Gets or sets the style field of a font description instance. The pango:style enumeration describes whether the font is slanted and the manner in which it is slanted. It can be either :normal, :italic, or :oblique. Most fonts will either have a italic style or an oblique style, but not both, and font matching in Pango will match italic specifications with oblique fonts and vice-versa if an exact match is not found.